Received: 18 July 2019
Accepted: 10 March 2020
First Online: 5 June 2020
Ethics approval and consent to participate
: Ethical approval was obtained from the ethics committee of the Uniklinik RWTH Aachen (EK 363–15). The study was an online-study. At the start of the survey it was clarified to the participants, that it is an anonymous survey. At no time ip addresses were saved by the survey system. Time and location stamps were not collected.
: Not applicable.
: The authors declare that they have no competing interests.